CN103232708A - Novel asphalt composite modifier, modified asphalt and preparation method of the modified asphalt - Google Patents
Novel asphalt composite modifier, modified asphalt and preparation method of the modified asphalt Download PDFInfo
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- CN103232708A CN103232708A CN2013100335138A CN201310033513A CN103232708A CN 103232708 A CN103232708 A CN 103232708A CN 2013100335138 A CN2013100335138 A CN 2013100335138A CN 201310033513 A CN201310033513 A CN 201310033513A CN 103232708 A CN103232708 A CN 103232708A
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Abstract
The invention discloses a novel asphalt composite modifier. The novel asphalt composite modifier is composed of sulphur or a sulphur-reinforced asphalt modifier (SEAM) and gypsum whisker according to a mass ratio of 4: 3. Sulphur, SEAM and gypsum whisker are cheap and easily available. Sulphur and gypsum whisker can produce synergism so that performances of modified asphalt satisfy national standard requirements under the premise of matrix asphalt use amount reduction and thus an engineering cost is reduced. The invention also discloses modified asphalt treated by the novel asphalt composite modifier. The modified asphalt comprises, by weight, 65% of pavement petroleum asphalt 70 and 35% of the novel asphalt composite modifier. The modified asphalt satisfies the road asphalt pavement construction technology standard JTGF40-2004, can be used for road asphalt pavement construction, and has a cost reduced by about 24%. The invention also discloses a preparation method of the modified asphalt. The preparation method is convenient for operation.
Description
Technical field
The invention belongs to chemical field, relate to a kind of asphalt modifier, modifying asphalt and preparation method thereof.
Background technology
Along with rising steadily of oil price and asphalt price, the price of SBS, SBR modifying asphalt is also soaring fast, has increased the construction investment of bituminous pavement greatly.Therefore, seek the lower and modified effect of price properties-correcting agent preferably, meet under the situation that national regulation requires in the performance that satisfies modifying asphalt, reduce asphalt content as much as possible, reduce engineering cost, become the problem that present asphalt pavement material research and investments in highway building owner pay close attention to.
Summary of the invention
In view of this, one of purpose of the present invention is to provide a kind of novel asphalt composite modifier, and is cheap and easy to get, and has synergistic function between the component, can under the situation that reduces the matrix pitch consumption, make the performance of modifying asphalt satisfy the national regulation requirement, thereby reduce engineering cost; Two of purpose of the present invention is to provide the modifying asphalt that utilizes described asphalt composite modifier to make, and its performance satisfies the asphalt highway construction technique normalizing, can be used for the asphalt highway construction, and cost reduces significantly; Three of purpose of the present invention is to provide described modified asphalt preparation method, and is easy and simple to handle.
For achieving the above object, the invention provides following technical scheme:
1. asphalt composite modifier is the sulphur of 4:3 or sulphur is strengthened asphalt modifier and crystal whisker of gypsum is formed by mass ratio.
Described sulphur is strengthened asphalt modifier, and (Sulphur Extended Asphalt Modifier is to have added the particle that smog inhibitor and a plasticiser component are made in the sulphur the inside SEAM), and main component is sulphur.
2. the modifying asphalt that utilizes described asphalt composite modifier to make is made up of the asphalt composite modifier of No. 70,65% bi tumenf orr oad and 35% by weight percentage.
Further, described bi tumenf orr oad is attached most importance to for No. 70 and is handed over bitumen A H-70.
3. modified asphalt preparation method, be in agitator, to add No. 70, bi tumenf orr oad accounting for modifying asphalt gross weight 75%, be warming up to 125 ~ 130 ℃, add the asphalt composite modifier that accounts for modifying asphalt gross weight 25%, temperature control stirred 30 ~ 40 minutes for 125 ~ 130 ℃ then, namely got modifying asphalt.
According to technique scheme, the asphalt composite modifier that adopts SEAM and crystal whisker of gypsum to form, the penetration degree of gained modifying asphalt (25 ℃, 100g 5s) is 69.7dmm, softening temperature is 56.8 ℃, 15 ℃ of ductilities are 45.5cm, satisfy the relevant regulations of " asphalt highway construction technique normalizing " JTG F40-2004, can be used for the asphalt highway construction, reduce asphalt content 35% simultaneously, reduce engineering cost about 24%.
Beneficial effect of the present invention is: the invention provides a kind of novel asphalt composite modifier, sulphur, SEAM and crystal whisker of gypsum be inexpensive being easy to get all, and has synergistic function between sulphur and the crystal whisker of gypsum, can under the situation that reduces the matrix pitch consumption, make the performance of modifying asphalt reach the national regulation requirement, thereby reduce engineering cost; The modifying asphalt that makes with this asphalt composite modifier satisfies the relevant regulations of " asphalt highway construction technique normalizing " JTG F40-2004, can be used for the asphalt highway construction, and cost reduces about 24%; Simultaneously, it is easy and simple to handle to prepare the method for modifying asphalt with this asphalt composite modifier.
Embodiment
In order to make purpose of the present invention, technical scheme and beneficial effect clearer, below the preferred embodiments of the present invention are described in detail.
Starting material and performance:
1, heavy traffic paving asphalt AH-70: provided by pitch storehouse, Sichuan Province Highway Administration Bureau of transportation department Qu County, its performance satisfies the correlation technique requirement among " asphalt highway construction technique normalizing " JTG F40-2004.
2, SEAM: produced by Shell Canada Ltd., sulphur content is 99.7%, and all the other performance index are as shown in table 1.
The performance of table 1 SEAM
| Physical index | Technical feature | Physical index | Technical feature |
| Density (g/cm 3） | 1.99 | Sulphur content (%) | 99.7 |
| Fusing point (℃) | 115 | Ash oontent (%) | 0.032 |
| Burning-point (℃) | 250 | Toxicity | Do not have |
| Boiling point (℃) | 445 | Outward appearance | The smoky gray solid particulate |
| Solvability | Water insoluble | ? | ? |
3, crystal whisker of gypsum: self-control, synthetic method is as follows: take by weighing and be crushed to the following gypsum 240g of 120 orders, be dissolved in the 8L water, make mass percentage concentration and be 3% slip, regulate pH to 5.0 with aqueous sulfuric acid (volume ratio of sulfuric acid and water is 1:3), transfer in the reactor, be heated to 125 ℃, add gypsum seed 0.67g and sal epsom 10.7g, with stirring velocity 110r/min insulated and stirred reaction 8 hours, after reaction finishes, filtered while hot, filter cake is used absolute ethanol washing 3 times again with hot wash 3 times, 200 ℃ of dryings 2 hours namely get crystal whisker of gypsum.Its performance index are as shown in table 2.
The performance of table 2 crystal whisker of gypsum
| Physical index | Technical feature | Physical index | Technical feature |
| Mean length (μ m) | 50~200 | Tensile modulus (Gpa) | 180 |
| Mean diameter (μ m) | 1~5 | Tensile strength (Gpa) | 20.8 |
| Density (g/cm 3） | 0.1~0.4 | Whiteness (%) | ≥98 |
| Aerated density | 2.70 | pH | 6~8 |
| Mohs' hardness | 3~4 | Purity (%) | ≥98 |
Embodiment, sulphur and crystal whisker of gypsum composite modified asphalt
In the pitch agitator, add 500g heavy traffic paving asphalt AH-70, be warming up to 130 ℃, add properties-correcting agent (SEAM and crystal whisker of gypsum volume per-cent refer to that all its weight accounts for the per-cent of modifying asphalt gross weight) according to weight percent shown in the table 3, temperature control stirred 30 minutes for 130 ℃ then, make modifying asphalt, measure penetration degree, softening temperature and ductility respectively according to test method T0604, the T0606, the T0605 that stipulate among " asphalt highway construction technique normalizing " JTG F40-2004.
The performance of table 3 sulphur and crystal whisker of gypsum composite modified asphalt
| Embodiment | SEAM volume (wt %) | Crystal whisker of gypsum volume (wt %) | Penetration degree (25 ℃, 5s, 100g) (dmm) | Softening temperature (℃) | 15 ℃ of ductilities (cm) |
| 1 | 0 | 0 | 70.0 | 52.7 | 100 |
| 2 | 5 | 0 | 94.8 | 60.5 | 48.5 |
| 3 | 10 | 0 | 54.8 | 57.3 | 48.5 |
| 4 | 20 | 0 | 55.1 | 59.8 | 100 |
| 5 | 0 | 5 | 43.5 | 61.4 | 59.2 |
| 6 | 0 | 10 | 38.7 | 61.9 | 44.3 |
| 7 | 0 | 15 | 23.1 | 64.7 | 27.0 |
| 8 | 0 | 20 | 22.7 | 63.6 | 18.3 |
| 9 | 5 | 5 | 72.5 | 57.0 | 48.8 |
| 10 | 5 | 10 | 64.0 | 57.7 | 46.3 |
| 11 | 5 | 15 | 59.0 | 63.2 | 43.5 |
| 12 | 5 | 20 | 60.8 | 54.0 | 58.5 |
| 13 | 5 | 25 | 56.0 | 62.1 | 62.0 |
| 14 | 5 | 30 | 50.5 | 67.7 | 48.4 |
| 15 | 10 | 5 | 64.1 | 55.7 | 45.5 |
| 16 | 10 | 10 | 63.5 | 60.0 | 43.3 |
| 17 | 10 | 15 | 42.4 | 57.8 | 24.2 |
| 18 | 10 | 20 | 51.5 | 63.8 | 62.5 |
| 19 | 10 | 25 | 25.2 | 64.4 | 9.0 |
| 20 | 10 | 30 | 27.7 | 68.3 | 5.0 |
| 21 | 15 | 5 | 44.6 | 59.0 | 33.0 |
| 22 | 15 | 10 | 77.7 | 64.3 | 32.6 |
| 23 | 15 | 15 | 32.3 | 59.0 | 15.5 |
| 24 | 15 | 20 | 32.9 | 62.5 | 11.7 |
| 25 | 20 | 5 | 32.6 | 50.8 | 39.0 |
| 26 | 20 | 10 | 39.8 | 49.8 | 45.0 |
| 27 | 20 | 15 | 69.7 | 56.8 | 45.5 |
| 28 | 20 | 20 | 47.8 | 59.0 | 36.0 |
| 29 | 25 | 10 | 36.3 | 58.0 | 26.3 |
| 30 | 30 | 10 | 45.5 | 61.8 | 18.7 |
Penetration degree, softening temperature and ductility are to estimate the key technical indexes of pitch fundamental property.Wherein, penetration degree is to estimate the index of pitch soft or hard degree and denseness, opposing shear fracture ability, and penetration degree is more little, shows that the denseness of pitch is more big; Softening temperature is the index of estimating the asphalt high-temperature non-deformability, it is generally acknowledged the softening temperature height, and the high-temperature stability of pitch is good; Ductility is to estimate the index of pitch crack resistance at low-temperature, and ductility is more big, shows that the snappiness of pitch is more good.According to the regulation of " asphalt highway construction technique normalizing " JTG F40-2004, and the penetration degree that No. 70, bi tumenf orr oad (25 ℃, 100g 5s) should be in 60 ~ 80dmm scope, and softening temperature should be not less than 43 ℃, and 15 ℃ of ductilities should be not less than 40cm.
As shown in Table 3,1. use sulphur modifying asphalt (embodiment 2 ~ 4) separately, when the sulphur volume is not higher than 20%, though the softening temperature of gained modifying asphalt and 15 ℃ of ductilities satisfy the national regulation requirement, but penetration degree does not satisfy the national regulation requirement, can not be used for the asphalt highway construction.In addition as can be seen, when the sulphur volume was not higher than 20%, the softening temperature of modifying asphalt was than 4.5 ℃ of matrix pitch risings (〉), illustrate that sulphur can improve the high-temperature stability of pitch; But when the sulphur volume was lower than 20%, 15 ℃ of ductilities of modifying asphalt obviously reduced (〉 50cm than matrix pitch), illustrate that content is lower than the snappiness that 20% sulphur can reduce pitch.
2. use crystal whisker of gypsum modifying asphalt (embodiment 5 ~ 8) separately, when the crystal whisker of gypsum volume is not higher than 20%, though the softening temperature of gained modifying asphalt satisfies the national regulation requirement, but penetration degree is lower than 45dmm, far do not satisfy the national regulation requirement, 15 ℃ of ductilities also significantly are lower than the national regulation requirement after the crystal whisker of gypsum volume is higher than 10%, can not be used for the asphalt highway construction.In addition as can be seen, when the crystal whisker of gypsum volume was not higher than 20%, the softening temperature of modifying asphalt was than 8.7 ℃ of matrix pitch risings (〉), illustrate that crystal whisker of gypsum can improve the high-temperature stability of pitch, its effect slightly is better than sulphur; And along with the increase of crystal whisker of gypsum volume, the penetration degree of modifying asphalt and 15 ℃ of ductilities have the trend that reduces gradually, illustrate that crystal whisker of gypsum can reduce denseness and the snappiness of pitch.
3. sulphur and crystal whisker of gypsum composite modified asphalt (embodiment 9 ~ 30), as seen embodiment 9-10,12,15-16, the penetration degree of 27 gained modifying asphalts, softening temperature and 15 ℃ of ductilities all satisfy the national regulation requirement, can be used for the asphalt highway construction, illustrate that sulphur and crystal whisker of gypsum can bring into play the modified synergic effect under certain proportion, can under the situation that reduces the matrix pitch consumption, make the performance of modifying asphalt reach the national regulation requirement, can solve single penetration degree and/or 15 ℃ of ductilities with sulphur or crystal whisker of gypsum modifying asphalt and not satisfy the problem that national regulation requires.
Simultaneously as can be seen, under the certain situation of the ratio of sulphur and crystal whisker of gypsum, what of sulphur and the total volume of crystal whisker of gypsum also have considerable influence to the performance of modifying asphalt.For example, the mass ratio of sulphur and crystal whisker of gypsum is 1:1 among the embodiment 9,16,23,28, the total volume of sulphur and crystal whisker of gypsum is respectively 10%, 20%, 30% and 40%, though the performance of the modifying asphalt that embodiment 9 and 16 makes satisfies the national regulation requirement, the penetration degree of the modifying asphalt that embodiment 23 and 28 makes and 15 ℃ of ductilities all do not satisfy the national regulation requirement; The mass ratio of sulphur and crystal whisker of gypsum is 1:2 among the embodiment 10,18, the total volume of sulphur and crystal whisker of gypsum is respectively 15% and 30%, though the performance of the modifying asphalt that embodiment 10 makes satisfies the national regulation requirement, the penetration degree of the modifying asphalt that embodiment 18 makes does not satisfy the national regulation requirement; The mass ratio of sulphur and crystal whisker of gypsum is 2:1 among the embodiment 15,26, the total volume of sulphur and crystal whisker of gypsum is respectively 15% and 30%, though the performance of the modifying asphalt that embodiment 15 makes satisfies the national regulation requirement, the penetration degree of the modifying asphalt that embodiment 26 makes does not satisfy the national regulation requirement.
In addition, analyze from the economy aspect, about 4800 yuan/ton respectively of the existing market prices of heavy traffic paving asphalt AH-70, sulphur and crystal whisker of gypsum, 1800 yuan/ton and 1000 yuan/ton, the price of pitch is higher than the price of sulphur and crystal whisker of gypsum far away, embodiment 9-10,12,15-16,27 gained modifying asphalts satisfy the consumption that has reduced matrix pitch under the situation of national regulation requirement in performance, effectively reduce engineering cost, have better economic.Wherein, embodiment 9 saving costs per ton are about 7%, embodiment 10 saving costs about 11% per ton, embodiment 12 saving costs about 19% per ton, embodiment 15 saving costs per ton are about 10%, and embodiment 16 saving costs per ton are about 14%, embodiment 27 saving costs about 24% per ton.
Explanation is at last, above preferred embodiment is only unrestricted in order to technical scheme of the present invention to be described, although the present invention is described in detail by above preferred embodiment, but those skilled in the art are to be understood that, can make various changes to it in the form and details, and not depart from claims of the present invention institute restricted portion.
Claims (4)
1. asphalt composite modifier is characterized in that, is that the sulphur of 4:3 or sulphur are strengthened asphalt modifier and crystal whisker of gypsum is formed by mass ratio.
2. the modifying asphalt that utilizes the described asphalt composite modifier of claim 1 to make is characterized in that, is made up of the asphalt composite modifier of No. 70,65% bi tumenf orr oad and 35% by weight percentage.
3. modifying asphalt according to claim 2 is characterized in that, described bi tumenf orr oad is attached most importance to for No. 70 and handed over bitumen A H-70.
4. claim 2 or 3 described modified asphalt preparation method, it is characterized in that, in agitator, add No. 70, bi tumenf orr oad accounting for modifying asphalt gross weight 65%, be warming up to 125 ~ 130 ℃, add the asphalt composite modifier that accounts for modifying asphalt gross weight 35%, temperature control stirred 30 ~ 40 minutes for 125 ~ 130 ℃ then, namely got modifying asphalt.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103694717A (en) * | 2013-12-30 | 2014-04-02 | 上海浦东路桥建设股份有限公司 | Road bitumen with high heat conduction efficiency and preparation method thereof |
| CN104004367A (en) * | 2014-04-28 | 2014-08-27 | 安徽红太阳新材料有限公司 | Preparation method of modified asphalt |
| CN108559296A (en) * | 2018-05-15 | 2018-09-21 | 苏州太星新材料科技有限公司 | A kind of Si（B）Fiber C high-viscosity high-elasticity asphalt modifying agent and its preparation and application |
| CN110491452A (en) * | 2019-08-13 | 2019-11-22 | 南京林业大学 | Performance of modified bitumen prediction technique based on molecular dynamics simulation |
| CN113214663A (en) * | 2021-05-12 | 2021-08-06 | 河南金欧特实业集团股份有限公司 | High-performance rubber asphalt for asphalt pavement and preparation method thereof |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103694717A (en) * | 2013-12-30 | 2014-04-02 | 上海浦东路桥建设股份有限公司 | Road bitumen with high heat conduction efficiency and preparation method thereof |
| CN104004367A (en) * | 2014-04-28 | 2014-08-27 | 安徽红太阳新材料有限公司 | Preparation method of modified asphalt |
| CN108559296A (en) * | 2018-05-15 | 2018-09-21 | 苏州太星新材料科技有限公司 | A kind of Si（B）Fiber C high-viscosity high-elasticity asphalt modifying agent and its preparation and application |
| CN108559296B (en) * | 2018-05-15 | 2021-03-19 | 苏州太星新材料科技有限公司 | Si (B) C fiber high-viscosity high-elasticity asphalt modifier and preparation and application thereof |
| CN110491452A (en) * | 2019-08-13 | 2019-11-22 | 南京林业大学 | Performance of modified bitumen prediction technique based on molecular dynamics simulation |
| CN113214663A (en) * | 2021-05-12 | 2021-08-06 | 河南金欧特实业集团股份有限公司 | High-performance rubber asphalt for asphalt pavement and preparation method thereof |
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